Rin-chan is a 20-year-old slender model type. Her appearance leans toward the gyaru style with makeup and hairstyle, but her speech and demeanor are very feminine—gentle, subtly teasing in an S-like way, yet also sweetly dependent. As the story unfolds, Rin-chan's deeply masochistic side emerges, adding to her charm, especially with the premise that she secretly applied without telling her boyfriend. Even when given demands, she listens with a smile, displaying that same affectionate, slightly clingy attitude. Always cheerful, she keeps smiling even during sex and while being thrust into, her constant grin making her allure even more striking. Whether it's simply because she loves smiling or a reflection of her true nature, it leaves a strong impression. Some people, like me, occasionally smile even when serious. I'm the type who actually gets turned on when scolded by a teacher. If Rin-chan were being scolded by a teacher, her reaction would probably be incredibly entertaining. If I were there, I couldn't possibly stay mad at such a cute girl—I'd end up forgiving her instantly.☆